Go Keyword range: Difference between revisions
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:Note that only a first identifier is declared, that is the ''index'' and not the value, as the intuition would suggest. See examples below | :Note that only a first identifier is declared, that is the ''index'' and not the value, as the intuition would suggest. See examples below.<br> | ||
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Revision as of 04:29, 28 March 2016
Internal
Overview
range keyword is used to iterate over arrays, slices, maps and variadic function arguments. It returns two values. On the first position is the index/kyes, and the second position is the value.
- Note that only a first identifier is declared, that is the index and not the value, as the intuition would suggest. See examples below.
Iterating over Indices
var a [5]int
for i := range a {
// i is the index
}
Iterating over Values
var a [5]int
for _, value := range a {
// 'value' is the value
}
Iterating over Indices and Values
var a [5]int
for i, value := range a {
// i is the index
// 'value' is the value
}